1TCSETPGRP(3P)              POSIX Programmer's Manual             TCSETPGRP(3P)
2
3
4

PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
10
11

NAME

13       tcsetpgrp — set the foreground process group ID
14

SYNOPSIS

16       #include <unistd.h>
17
18       int tcsetpgrp(int fildes, pid_t pgid_id);
19

DESCRIPTION

21       If the process has a controlling terminal, tcsetpgrp()  shall  set  the
22       foreground  process  group  ID associated with the terminal to pgid_id.
23       The application shall ensure that the file associated  with  fildes  is
24       the  controlling  terminal  of  the calling process and the controlling
25       terminal is currently  associated  with  the  session  of  the  calling
26       process. The application shall ensure that the value of pgid_id matches
27       a process group ID of a process in the  same  session  as  the  calling
28       process.
29
30       Attempts to use tcsetpgrp() from a process which is a member of a back‐
31       ground process group on a fildes associated with its controlling termi‐
32       nal  shall  cause the process group to be sent a SIGTTOU signal. If the
33       calling thread is blocking SIGTTOU signals or the process  is  ignoring
34       SIGTTOU signals, the process shall be allowed to perform the operation,
35       and no signal is sent.
36

RETURN VALUE

38       Upon successful completion, 0 shall be returned. Otherwise, −1 shall be
39       returned and errno set to indicate the error.
40

ERRORS

42       The tcsetpgrp() function shall fail if:
43
44       EBADF  The fildes argument is not a valid file descriptor.
45
46       EINVAL This  implementation  does  not support the value in the pgid_id
47              argument.
48
49       EIO    The process group of the writing process is orphaned, the  call‐
50              ing  thread  is  not  blocking  SIGTTOU,  and the process is not
51              ignoring SIGTTOU.
52
53       ENOTTY The calling process does not have a controlling terminal, or the
54              file  is not the controlling terminal, or the controlling termi‐
55              nal is no longer associated with  the  session  of  the  calling
56              process.
57
58       EPERM  The value of pgid_id is a value supported by the implementation,
59              but does not match the process group ID of a process in the same
60              session as the calling process.
61
62       The following sections are informative.
63

EXAMPLES

65       None.
66

APPLICATION USAGE

68       None.
69

RATIONALE

71       None.
72

FUTURE DIRECTIONS

74       None.
75

SEE ALSO

77       tcgetpgrp()
78
79       The Base Definitions volume of POSIX.1‐2008, <sys_types.h>, <unistd.h>
80
82       Portions  of  this text are reprinted and reproduced in electronic form
83       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
84       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
85       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
86       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
87       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
88       event of any discrepancy between this version and the original IEEE and
89       The Open Group Standard, the original IEEE and The Open Group  Standard
90       is  the  referee document. The original Standard can be obtained online
91       at http://www.unix.org/online.html .
92
93       Any typographical or formatting errors that appear  in  this  page  are
94       most likely to have been introduced during the conversion of the source
95       files to man page format. To report such errors,  see  https://www.ker
96       nel.org/doc/man-pages/reporting_bugs.html .
97
98
99
100IEEE/The Open Group                  2013                        TCSETPGRP(3P)
Impressum